Plates, Quakes, Volcanoes

Front

The movement of the tectonic plates is caused by

Back

convection currents in the Asthenosphere

Front

In some areas of the world, like California and Japan, earthquakes are a common occurrence. How can this best be explained?

Back

Both areas are on the boundary of active plates, the motion of the plates causes earthquakes.

Front

Subduction zones occur on Earth where dense oceanic crust dives under more buoyant continental crust. These boundaries are characterized by a deep ocean trench next to a high continental mountain range, large numbers of earthquakes and volcanoes. All of this is further evidence for the

Back

theory of plate tectonics.

Front

There are three types of plate boundaries. Which choice is NOT a type of plate boundary? Options: convergent, thrust, divergent, transform

Back

thrust

Front

Observe this diagram of a plate boundary. One statement BEST describes what is happening. It is that: the oceanic crust is melting, the denser oceanic crust is subducting under the less dense continental crust, volcanic islands are forming, the tectonic plates are moving away from each other.

Back

the denser oceanic crust is subducting under the less dense continental crust

Front

What geological forces might be responsible for this range of mountains? Options: diverging tectonic plates, erosion of the land by the ocean, converging tectonic plates, deposition of sediments by the ocean

Back

converging tectonic plates

Front

The Earth’s surface is not a solid surface but is divided into

Back

continental and oceanic plates.

Front

Which geological features MOST LIKELY prompted the development of the theory of plate tectonics? Options: river deltas, mountain ranges, glacier fields, tropical rainforests

Back

mountain ranges

Front

What evidence supports the theory that the tectonic activity of the Pacific Ring of Fire is due to the subduction of tectonic plates?

Back

The Asia-Pacific region is dotted by many small and large islands.

Front

The Atlantic Ocean gets about 3-5 ______ wider each year.

Back

centimeters